Underground-telegraph line



2 Sheets-Sheet 1.

(No Model.)

W. COHLMAN.

UNDERGROUND TBLEGNAPH LINE.

Patented Mey` 8, 1883.

IN VEN TOR @mummww (No Model.) l 2 sheets-sheet 2. W. GOHLMAN.

UNDERGROUND TELEGRAPH LINE.

No; 277,oo7.

Patented May 8,1888.

A l INV/,'NVUH f (Wymw 0,5/ fOwxfbww MW M EETERS. Pholzrmnpmr, Wmingx UNITED STATES PATENT OFFICE.,

WILLIAM COHLMAN, 0F PHILADELPHIA, PENNSYLVANIA.

UNDERGROUND-TELEGRAPH LINE.

SPECIFICATION forming part of Letters Patent No. 277,007, dated May 8, 1883.

Application filed March .23, 1883.

To all whom it may concern:

Be it known that I, WILLIAM GoIILMAN, a citizen ot' the/United States, and a resident of Philadelphia,Pennsylvania, have invented an Improvement in Underground-Telegraph Lines, of which the following is a specification. y

The object of my inventionA is an underground-telegraph line which can be constructed rapidly and economically, and can be made to accommodate a great number of wires, to any one of which access can be had without removing the others; and this object I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawings, in whicht Figure l is a transverse vertical section ot' an underground telegraph line constructed in accordance with my invention; Fig. 2, a side view of part of the same with the covering removed; Fig. 3, an enlarged view of part ofthe structure, and Fig. 4 a perspective view of one ofthe sections ot' the cover.

A is a pipe ortube, which may represent any ot the underground conduits with which cities are providedsuch as a water, drain, or sewer pipe-it being one ot' the objects ot' my invention to use these pipes, which are already in position, as a means ot' supporting the structure which carries the wires; or where this is not permissible I propose to lay the pipe A, which can be used t'or any of the purposes specified or as a conduit for electriclight wires.

To the pipe A, at appropriate intervals, are secured frames B, in which are formed openings for the reception ot' the electrical conductors x, the openings being arranged as closely together as possible without risking the contact otl the wires with each other or vinterfering with access to any of the wires (No model.)

which pass around the lower halt ot the pipe, so that vertical displacement of the trames is impossible.

The frames B and the wires carried thereby are inclosed by a casing, F, of clay or cement, this casing resting upon the flanges l), and being made in sections meeting with a lap-joint at the top, and with lap, beveled, or undercut joints at the ends, so that when the sections of the casing are titted together yand to the Iianges b they will form a watertight covering, the joints' being preferably luted or sealed to insure this result. Some of the sections of the casing may be furnished with tubular projections g, as shown, a section ot' this character being used whenever a branch from the main line becomes necessary.

By utilizing the pipe A as a means ot supporting the frames B, which carry the wires, a saving in expense is effected; and as the operations ot' bolting the frames B to the pipe, drawing the wires through the openings inthe frames, and fitting the sections of the casing into place are such as can be readily eflected, the construction ot' the line is facilitated, and economy is insured.

The casing B may rest on a special foundation instead of on the flange b but the latter plan is preferred as the most economical.

I claim as my invention- 1. The combination of the pipe A, the frames B, mounted on and supported by said pipe, and having openings for the wires, with the inclosing-I'rame F, as set forth.

2. The combination ot'the pipe A, the frames `B, having iianges b, and the bands j', having lianges d, bolted to said flanges b, as set forth.

The combination ofthe pipe A, the frames B, carrying the wires, and the inclosing-casing F, made in sections, as set forth.

4. The combination ofthe pipe A, the frames B, carrying the wires and having ianges b, and the inclosing-casing F, resting on said flanges, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

VILLIAM COHLMAN.

Witnesses:

HARRY H. ASHENFELTER, HARRY SMITH.

lOO 

